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<h3 class="section" id="Predefined-Macros-1"><span>3.7 Predefined Macros<a class="copiable-link" href="#Predefined-Macros-1"> &para;</a></span></h3>

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<p>Several object-like macros are predefined; you use them without
supplying their definitions.  They fall into three classes: standard,
common, and system-specific.
</p>
<p>In C++, there is a fourth category, the named operators.  They act like
predefined macros, but you cannot undefine them.
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